The FDA has warned male consumers about using the products Actra-Rx and Yilishen to treat erectile dysfunction or to enhance sexual performance. The two drugs are promoted as dietary supplements on Web sites and contain the prescription drug sildenafil which can be dangerous. These drugs normally have to be declared and approved but products labeled as dietary supplements can evade this process. Sildenafil is the active ingredient in the FDA approved Viagra. However, if sildenafil is taken with some prescription drugs containing nitrates or with some illegal drugs such as amyl nitrate, it may cause a dangerous reduction in blood pressure. Nitrates are often taken by people suffering from diabetes, high blood pressure, high cholesterol or heart disease. A ban has also been imposed on the importation of the product. People taking the drug are advised to stop and seek professional advise for alternatives.

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